[Fixed Position] Add tests and fix checkstyle error.

Fixes #1496

platform/features/layout/src/FixedController.js

@@ -256,8 +256,7 @@ define(
                     titled: true,
                     width: DEFAULT_DIMENSIONS[0],
                     height: DEFAULT_DIMENSIONS[1],
-                    useGrid: true,
-                    size: "14px"
+                    useGrid: true
                 });
 
                 //Re-initialize objects, and subscribe to new object

platform/features/layout/src/elements/ElementFactory.js

@@ -42,8 +42,7 @@ define(
                 },
                 "fixed.text": {
                     fill: "transparent",
-                    stroke: "transparent",
-                    size: "13px"
+                    stroke: "transparent"
                 }
             },
             DIALOGS = {

platform/features/layout/src/elements/TextProxy.js

@@ -67,6 +67,10 @@ define(
              */
             proxy.size = new AccessorMutator(element, 'size');
 
+            if (proxy.size() === undefined) {
+                proxy.size("13px");
+            }
+
             return proxy;
         }